MS-721 · Question #289
MS-721 Question #289: Real Exam Question with Answer & Explanation
The correct answer is A: Grant-CsCallingLineIdentity -Identity [email protected] -PolicyName CallerID. User1 has two separate issues: no phone number assigned (causing inbound call failures from the PSTN) and no Caller ID policy applied (causing missing caller ID on outbound calls). Two commands are required because each resolves a distinct problem.
Question
You have a Microsoft Teams Phone deployment. The 613 7010 5XXX phone number range is allocated to the Session Border Controller (SBC). A user named User1 is configured as shown in the following exhibit. User1 reports that when an external caller attempts to call the phone number of User1, the external caller receives an error message. User1 can make outbound calls, but no caller ID appears. Which two commands should you run to resolve the issues? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point.
Options
- AGrant-CsCallingLineIdentity -Identity [email protected] -PolicyName CallerID
- BGrant-CsOnlineVoiceRoutingPolicy -Identity [email protected] -PolicyName $null
- CRemove-CsPhoneNumberAssignment -Identity [email protected] -PhoneNumber
- DSet-CsPhoneNumberAssignment -Identity [email protected] -PhoneNumber +61370105555
- ESet-CsPhoneNumberAssignment -Identity [email protected] -EnterpriseVoiceEnabled $true
Explanation
User1 has two separate issues: no phone number assigned (causing inbound call failures from the PSTN) and no Caller ID policy applied (causing missing caller ID on outbound calls). Two commands are required because each resolves a distinct problem.
Common mistakes.
- B. Setting the OnlineVoiceRoutingPolicy to $null removes the voice routing policy from User1 entirely, which would disable outbound PSTN calling rather than fix any reported issue.
- C. Remove-CsPhoneNumberAssignment removes an existing number assignment rather than adding one, which would worsen the inbound routing failure instead of resolving it.
- E. Since User1 can already make outbound calls, Enterprise Voice is already enabled, so setting EnterpriseVoiceEnabled to $true on the number assignment would be redundant and resolves neither the inbound error nor the missing caller ID.
Concept tested. Teams Direct Routing number assignment and Caller ID policy
Reference. https://learn.microsoft.com/en-us/microsoftteams/set-the-caller-id-for-a-user
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